diff --git a/kraken-report.py b/kraken-report.py
index 9695d0a..5ae7f61 100755
--- a/kraken-report.py
+++ b/kraken-report.py
@@ -149,7 +149,9 @@ if __name__ == '__main__':
   fh = open(filename, 'r')
   csv_data = csv.DictReader(fh)
   for line in csv_data:
-    if not data.has_key(line['pair']):
+    if not 'pair' in data:
+    # ^py3 way of doing things, py2:
+    #if not data.has_key(line['pair']):
       data[line['pair']] = []
     data[line['pair']].append(line)